\Spec"tral\, a.
1. Of or pertaining to a specter; ghosty.
         He that feels timid at the spectral form of evil is
         not the man to spread light.          --F. W.
                                               Robertson.
2. (Opt.) Of or pertaining to the spectrum; made by the
   spectrum; as, spectral colors; spectral analysis.
{Spectral lemur}. (Zo["o]l.) See {Tarsius}.